The Blacklist is not always up to date. Its better to check ANN as it lists all the companies involved with each production.
Please note that the following lists of anime/manga is far from complete.
~sauceThe list is there because those companies are known to actively police the distribution of their products. As such to avoid raising alerts and avoid C&D letters BakaBT takes them down early. This way the site is kept 'under the radar'.
So as blubart put it. Yes. To avoid lawsuits.